Managing Local Emergency Numbers

Abstract

Described herein is a system and method in a user equipment (UE) supporting registration using third generation partnership project (3GPP) access and using non-3GPP access, the method comprising storing, in a memory of the UE, first emergency information received using first registration procedures; receiving, by the UE, a REGISTRATION ACCEPT message using second registration procedures via non-3GPP access; and keeping, in the memory, the first emergency information after receiving the REGISTRATION ACCEPT message.

What is claimed is: 
     
         1 . A method comprising:
 receiving, by a user equipment (UE) in a first country via a first access network type (ANT), from a first access and mobility management function (AMF), a first REGISTRATION ACCEPT message with an extended local emergency numbers list, wherein the extended local emergency numbers list comprises a validity indication;   storing the extended local emergency numbers list;   receiving, by the UE in the first country via a second ANT, from a different AMF, a second REGISTRATION ACCEPT message without a list of emergency numbers; and   discarding the stored extended local emergency numbers list.   
     
     
         2 . The method of  claim 1 , wherein neither the first ANT nor the second ANT is configured to support non-access stratum (NAS) procedures in evolved packet system (EPS). 
     
     
         3 . The method of  claim 1 , wherein the first and second REGISTRATION ACCEPT messages are part of an NAS procedure in 5G system (5GS). 
     
     
         4 . The method of  claim 1 , wherein the validity indication indicates that the list is valid in a country. 
     
     
         5 . The method of  claim 1 , wherein the validity indication indicates that the list is valid in a Public Land Mobile Network (PLMN), and wherein the first AMF is part of a PLMN. 
     
     
         6 . The method of  claim 1 , wherein the first REGISTRATION ACCEPT message omits a local emergency number list. 
     
     
         7 . The method of  claim 1 , wherein the discarding comprises discarding based on the second ANT being a non-Third Generation Partnership Project (3GPP) access. 
     
     
         8 . A user equipment (UE) configured to:
 receive, in a first country via a first access network type (ANT), from a first access and mobility management function (AMF), a first REGISTRATION ACCEPT message with an extended local emergency numbers list, wherein the extended local emergency numbers list comprises a validity indication;   store the extended local emergency numbers list;   receive, in the first country, via a second ANT, from a different AMF, a second REGISTRATION ACCEPT message without a list of emergency numbers; and   discard the stored extended local emergency numbers list.   
     
     
         9 . The UE of  claim 8 , wherein the first network or the second network is not configured to support non-access stratum (NAS) procedures in evolved packet system (EPS). 
     
     
         10 . The UE of  claim 8 , wherein the first and the second REGISTRATION ACCEPT messages are part of an NAS procedure in 5G system (5GS). 
     
     
         11 . The UE of  claim 8 , wherein the validity indication indicates that the list is valid for a country. 
     
     
         12 . The UE of  claim 8 , wherein the validity indication indicates that the list is valid for a Public Land Mobile Network (PLMN), and wherein the first AMF is part of a PLMN. 
     
     
         13 . The UE of  claim 8 , wherein the first REGISTRATION ACCEPT message omits a local emergency number list. 
     
     
         14 . The UE of  claim 8 , configured to discard the stored extended local emergency numbers list based on the second ANT being a non-Third Generation Partnership Project (3GPP) access. 
     
     
         15 . A non-transitory computer readable medium comprising instructions which when executed by a user equipment (UE), cause the UE to:
 receive, in a first country via a first access network type (ANT), from a first access and mobility management function (AMF), a first REGISTRATION ACCEPT message with an extended local emergency numbers list, wherein the extended local emergency numbers list comprises a validity indication;   store the extended local emergency numbers list;   receive, in the first country, via a second ANT, from a different AMF, a second REGISTRATION ACCEPT message without a list of emergency numbers; and   discard the stored extended local emergency numbers list.   
     
     
         16 . The non-transitory computer readable medium of  claim 15 , wherein the first and the second REGISTRATION ACCEPT messages are part of a non-access stratum (NAS) procedure in 5G system (5GS). 
     
     
         17 . The non-transitory computer readable medium of  claim 15 , wherein the validity indication indicates that the list is valid for a given country. 
     
     
         18 . The non-transitory computer readable medium of  claim 15 , wherein the validity indication indicates that the list is valid for a Public Land Mobile Network (PLMN), and wherein the first AMF is part of a PLMN. 
     
     
         19 . The non-transitory computer readable medium of  claim 15 , wherein the first REGISTRATION ACCEPT message omits a local emergency number list. 
     
     
         20 . The non-transitory computer readable medium of  claim 15 , configured to discard the stored extended local emergency numbers list based on the second ANT being a non-Third Generation Partnership Project (3GPP) access.